AD7693

Data Sheet

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

Application Diagram........................................................................ 1

General Description......................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Timing Specifications....................................................................... 5

Absolute Maximum Ratings............................................................ 6

ESD Caution.................................................................................. 6

Pin Configurations and Function Descriptions ........................... 7

Terminology ...................................................................................... 8

Typical Performance Characteristics ............................................. 9

Theory of Operation ...................................................................... 12

Circuit Information.................................................................... 12

Converter Operation.................................................................. 12

Typical Connection Diagram ................................................... 13

Analog Inputs.............................................................................. 14

Driver Amplifier Choice ........................................................... 14

Single-Ended-to-Differential Driver ....................................... 15

Voltage Reference Input ............................................................ 15

Power Supply............................................................................... 15

Supplying the ADC from the Reference.................................. 16

Digital Interface.......................................................................... 16

CS Mode, 3-Wire Without Busy Indicator ............................. 17

CS Mode, 3-Wire with Busy Indicator .................................... 18

CS Mode, 4-Wire Without Busy Indicator ............................. 19

CS Mode, 4-Wire with Busy Indicator .................................... 20

Chain Mode Without Busy Indicator ...................................... 21

Chain Mode with Busy Indicator............................................. 22

Application Hints ........................................................................... 23

Layout .......................................................................................... 23

Evaluating AD7693 Performance............................................. 23

Outline Dimensions....................................................................... 24

Ordering Guide .......................................................................... 24

REVISION HISTORY

6/14—Rev. A to Rev. B

Added Patent Footnote .................................................................... 1

Changes to Evaluating the AD7693 Performance Section........ 23

Updated Outline Dimensions (Dimensions Not Changed;

Lead-to-Pad Dimensions Updated for JEDEC Compliance) ... 24

Changes to Ordering Guide .......................................................... 24

6/11—Rev. 0 to Rev. A

Changes to Resolution Parameter and Common-Mode Input

Range Parameter in Table 2..............................................................3

Changes to Figure 6 and Table 6......................................................7

Updated Outline Dimensions....................................................... 24

Changes to Ordering Guide.......................................................... 24

12/06—Revision 0: Initial Version

Rev. B | Page 2 of 24